feat(alerting): add ALERT_RULE_CHANGE + ALERT_SILENCE_CHANGE audit categories

cameleer-server-core/src/main/java/com/cameleer/server/core/admin/AuditCategory.java

@@ -2,5 +2,6 @@ package com.cameleer.server.core.admin;
 
 public enum AuditCategory {
     INFRA, AUTH, USER_MGMT, CONFIG, RBAC, AGENT,
-    OUTBOUND_CONNECTION_CHANGE, OUTBOUND_HTTP_TRUST_CHANGE
+    OUTBOUND_CONNECTION_CHANGE, OUTBOUND_HTTP_TRUST_CHANGE,
+    ALERT_RULE_CHANGE, ALERT_SILENCE_CHANGE
 }

cameleer-server-core/src/test/java/com/cameleer/server/core/admin/AuditCategoryTest.java

@@ -0,0 +1,12 @@
+package com.cameleer.server.core.admin;
+
+import org.junit.jupiter.api.Test;
+import static org.assertj.core.api.Assertions.assertThat;
+
+class AuditCategoryTest {
+    @Test
+    void alertingCategoriesPresent() {
+        assertThat(AuditCategory.valueOf("ALERT_RULE_CHANGE")).isNotNull();
+        assertThat(AuditCategory.valueOf("ALERT_SILENCE_CHANGE")).isNotNull();
+    }
+}